Showing papers by "James J. Gibson published in 1989"
Patent•
11 Aug 1989TL;DR: In this article, the auxiliary signal is modulated on a further carrier of such frequency that the upper sidebands of the modulated further carrier, representing the auxiliary information, occupy the frequency spectrum of the vestigial sideband of the VBS signal and occur clustered at odd multiples of half line frequency.
Abstract: Apparatus for augmenting a television signal with auxiliary signal includes circuitry for modulating a picture carrier with baseband video signal to generate a vestigial sideband television signal. Auxiliary signal is modulated on a further carrier of such frequency that the upper sidebands of the modulated further carrier, representing the auxiliary information, (1) occupy the frequency spectrum of the vestigial sideband of the vestigial sideband television signal and (2) occur clustered at odd multiples of half line frequency. The sidebands of the modulated further carrier are added to the vestigial sideband television signal in frequency interleaved fashion in the vestigial sideband spectral region.
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